The Leopoldina is the oldest German-speaking society of scholars with a history of more than 350 years. It is a free association of scholars acting to advance human scientific development beyond the boundaries of disciplines and countries. Approximately three quarters of its members are from the German-speaking countries of Germany, Austria and Switzerland, while the remainder are from other countries. In 2008, the Leopoldina became the National Academy of Sciences in Germany.

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When I met him he was indeed in Germany in a top position in Max Planck, a very nice environment. He has contributed to change an institute which was on "metal research", into more bio-nano emerging fields. Evidently, he is still very much remembered in Germany for his contributions. I am sure he has adapted back to the US system and will not miss opportunities to engage in always newer field.

In fact, in my CV I find it as a poor result that I have only a paper with him!

Adhesion maps of spheres corrected for strength limitH Yao, M Ciavarella, H Gao - Journal of colloid and interface science, 2007 - ElsevierPresent understanding of adhesion is mostly due to the well-known contact theories for spheres, including JKR (Johnson–Kendall–Roberts), DMT (Derjaguin–Muller–Toporov) and MD (Maugis–Dugdale). Since most of the models exhibit their optimal applicability only in a